Scene Screen Blank, Title Messed Up

I just opened some of my files, and they all basically look like this image: Everything blank, with the title showing “Title Version: Title”. The Render and Play seems to work right (save for one or two missing pieces?), but I can’t work with my projects like this. Anyone know how I can fix my things? Thanks.

EDIT: Just minutes ago, I clicked the window with my drawing and/or the drawing/camera tabs, and now I can see all my drawings again. In short, I’m now asking how this happened, and how can I prevent it in the future. Thanks again.